tree 94cdc8e63c0c529e1fc24c73714927b94eb3b23c
parent a59059f3a179d2c6de18e7ca3db7c565eba1c02e
author Cole Faust <colefaust@google.com> 1651106975 -0700
committer Cole Faust <colefaust@google.com> 1651106975 -0700

Convert firstword/lastword to starlark functions instead of index operators

firstword/lastword need to be able to give an empty string when
the input is empty, which the indexing operator can't do.

Bug: 226974242
Test: go test
Change-Id: I44162a258297b32ec27e7acfb1fa06223391dcc6